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LOKAL 400 Operating Manual 

Page 29 

 

13. Specifications 

 

Technical data 

  Lokal 400 

 

Operating modes

 

correlation leakage detection (automatic, manual); 
acoustic leakage detection (volume, Smart) 

Measuring functions and device functions

 

automatic filter adjustment, automatic amplification, 
memory preference function for manual filter  setting, 
hearing protection  

 

Measuring resolution correlation 

1500 Points or 
5cm for 100metres of measured distance 

Measuring resolution geophone 

0-99 digits (equivalent to dB) 

Control

 

through touch screen or through keys and dial 

 

Amplification

 

120 dB with low noise factor 

 

Input impedance

 

1 mega ohm 

 

Correlation 

64 Bit 

Analog filter 

Chebyshev 48dB/Octave 

Filters

 

256 high-pass and low-pass filter combinations 

 

Display

 

5.7“  touch-color-LCD  with  integrated  background 
lighting 

 

Battery control

 

through microcontroller 

 

Output impedance

 

< 10 ohm 

 

Power supply

 

integrated Ni-MH accumulator, 8,500 mAh 

 

Operating period

 

more  than 10  hours  of  permanent  operation  with  one 
charging cycle 

 

Memory 

up to 100 measurements per operating mode 

Connections 

2x TNC aerial jacks 
bayonet sensor jack (IP 65) 
push-pull jack for charger, with cover (IP 65) 
push-pull jack for headphones, with cover (IP 65) 
USB cable jack, with cover (IP 65) 

 

Safety class 

IP 65 

 

Housing 

aluminium, powder-coated 

 

Temperature range 

operation: between -10°C and +55 °C;  
storage: between -25 °C and +65 °C 

 

Dimensions (approx.) 

L 380 x W 155 x H 67mm 

 

Weight (approx.) 

2,300 grams 

 

Technical data 

  MB4 Measurement boxes 

 

Display 

numerical and graphical noise level indication 

 

Transmission power 

real 500 mW 

 

Background lighting 

automatic 

 

Housing 

aluminium, powder-coated 

 

Operating period 

More  than  9  hours  of  permanent  operation  with  one 
charging cycle 

Temperature range 

operation: between -20°C and +60 °C;  
storage: between -25 °C and +65 °C 

 

Dimensions (approx.) 

L 225 x W 165 x H 100mm 

 

Weight (approx.) 

2,900 grams 

 

Technical data 

  Accelerometer sensors 

 

Microphone 

Piezoceramics  

 

Safety class 

IP 68 

 

Содержание Lokal 400

Страница 1: ...Lokal400OperatingManual Page1 Lokal 400 Operating Manual...

Страница 2: ...ttings 9 7 1 Automatic measurement 12 7 2 Manual measurement 13 7 3 Setting options for correlation correlation main window 14 7 4 Receiving radio data 17 7 5 Transauto function 17 8 Acoustic leakage...

Страница 3: ...nt range of the particular measuring sensors microphones before you start the measurement procedure Please ensure proper storage and operating conditions Any measurement data evaluations any conclusio...

Страница 4: ...od 5 Ground microphone with spiral cable 6 Testrod with extensions 7 Adapter for headphones to be connected to central unit 8 Tripod with magnets for ground microphone 9 Headphones 10 Adapter cable fo...

Страница 5: ...al function dial Turn the dial to access the menu and setting functions and to specify already selected settings Press the dial to confirm any selection or setting 6 Aerial connection left 7 Jack for...

Страница 6: ...e reduced or another type of sensor has to be selected for the leakage detection procedure Basically there are two different types of sensor available Accelerometer sensor Chapter 3 2 or 3 Hydrophone...

Страница 7: ...und If the ground is unsurfaced e g grass or gravel surface the ground microphone can be attached to the tripod magnet 8 Therefore it is perfectly suited for double check or verify correlation results...

Страница 8: ...e highlighted in yellow Assoonastheoperatorhas pressedthedialtoconfirmhis herselection therequestedmenuitemandselection boxrespectivelyisdisplayed Pressing on Cancel makes the system leave the current...

Страница 9: ...on the touch screen please use the lower figure box for the input The input can be confirmed by tapping on the OK icon and the input can be deleted by tapping on DEL Please note that you will have to...

Страница 10: ...ted The maximum frequency range available for the geophone mode is 4 000Hz The configuration process complies with the setting process for the date and the time of day as described in Chapter 6 3 1 6...

Страница 11: ...try B Sensor entry C Sensor entry A B and C are the channels of the measurement boxes A red B blue C yellow and Sensor entry indicates the direct connection of any microphone see Chapter 5 Section Sen...

Страница 12: ...window i e there is the option to readjust the parameters manually after a certain measurement also in the automatic mode 7 1 Automatic measurement If you intend to carry out a measurement in the aut...

Страница 13: ...ct position of the source of the noise When the measurement has been completed the number of average determinations stops counting up for the automatic mode a total of 50 average determinations has be...

Страница 14: ...urement procedure will run up to 250 average determinations in the manual mode unless the measurement is interrupted beforehand Usually 40 to 50 average determinations are sufficient to receive a prop...

Страница 15: ...stem re calculate the coherence image through the function 8 before the filters are set again to have the current coherence displayed If you press the Update button it may take several seconds until t...

Страница 16: ...OKAL 400 system will automatically adjust the amplification level 7 3 3 Correlationresults If a measurement isstopped either afterthemaximumaverage determinations have been completed 50 determinations...

Страница 17: ...o the correlation main window where the saved result will be displayed and the pipe parameters length material diameter can be changed 7 4Receivingradiodata The system indicates through the two icons...

Страница 18: ...lf Perhaps through new positioning of the MB s thenoisefrom the leak itself could be used to calibratethe sound velocity for the section 2 Type in the pipe parameters for the section into the Lokal 40...

Страница 19: ...the volume headphones 4 Selecting the sensors filter pre selections 5 Selecting the measurement mode 6 Saving a measurement 7 Uplopading a measurement 8 1 Settingtheacousticparameters 8 1 1 Adjustingt...

Страница 20: ...te the symbol and confirm your selection The window where the filter pre settings can be selected will open up now Three pre settings are available Fittings 2 A frequency range of 0 to 2 000 Hz is pre...

Страница 21: ...rement curve and the current measurement series will not be deleted by the change in volume Adjusting the volume during a measurement procedure Thevolumecanbeadjustedanytimeduringameasurementprocessby...

Страница 22: ...donposition1 andeverynewmeasurementshiftstheprecedingmeasurement to the right As soon as the sixth position has been filled the oldest measurement on position 6 will be deleted and will be replaced Th...

Страница 23: ...400 device is capable of carrying out up to seven measurements simultaneously as a measurementseries Thismeasurementseries can be displayed inthemeasurement indication window If the parameter settings...

Страница 24: ...ate the headphones during the filter setting process This function can be activated de activated by pressing the key briefly while running the filter setting process The status symbol for the addition...

Страница 25: ...program allows printing outareport carrying outfirmwareupdates andloading additionallanguagestothedevice For a more detailed description of the program and its operation please refer to the separate P...

Страница 26: ...is not appropriate for the pipe section to be checked See Chapter 5 1 Powering up for correlation and Different types of sensor 2 Sensor has come off the fitting pipe Attach the sensor to the fitting...

Страница 27: ...kal 400 device 2 Defective central unit Please contact our Customer Service department Display insufficient brightness 1 Inappropriate lighting settings IncreasethelightingintensityforthedisplayattheS...

Страница 28: ...FAST transport case for the LOKAL 400 device and its accessories if you need to shuttle the equipment from one place to the other This case has perfect cavity inserts for the particular components The...

Страница 29: ...r supply integrated Ni MH accumulator 8 500 mAh Operating period more than 10 hours of permanent operation with one charging cycle Memory up to 100 measurements per operating mode Connections 2x TNC a...

Страница 30: ...ble to pick up with a ground microphone The sound caused by the leak can be made audible again if compressed air can be fed into the pipe system that is being examined In such a case the compressed ai...

Страница 31: ...e actual leak If this first stage is not performed the whole length of the pipe will have to be inspected in order to determine the exact location of the leak 16 1 2 1 Narrowing Down the Leak by Using...

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